Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d4152eb866f3f99…

MALICIOUS

PDF

105.3 KB Created: 2020-11-13 09:03:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 687622d187225f55e3e6dc6be0e6aa7f SHA-1: dde6baa34bca2a73858084da6a358ac9c4488cb2 SHA-256: 8d4152eb866f3f9976e42fce7a7536c9649c11327984ca85196f09f3ffeca113
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffnew.ru/strik?utm_term=pastorelas+comicas+cortas+guion+grat PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f8b0579a75c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/34200d14-cad3-40b7-a8d9-2ce0c1548454/raruxewese.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/pibepisodivuxapeg.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/school_of_chaos_mod_apk_1.748.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de4192b8-bb3c-49be-8392-4a0db57b5d7d/91471317278.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/functions_of_management_information_system.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/quizlet_duplicate_set.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c916e7e-e6f6-4b78-b63d-cc1d7d7e0078/sifevax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7682f118-8bc9-450c-9f4d-697b852d987c/66524018083.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10506e55-5fad-4ab0-a4a4-40e9e1b9a7dd/71360345076.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/432e1b19-a1bd-47a2-8d65-482e813b9deb/9888443555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/514f21e0-cb33-47a2-b3f4-0f499c844e99/wagiwaxowo.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/21402408392.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e51478f-5635-4327-8202-6d9aad3712ec/vatiduwemomolivotitut.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/bobuxotopenajot.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/the_hydrogen_spectrum_mastering_physics.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16036 5120 bytes
SHA-256: 37003ba6ea1ef730a28918b508078b507c49319e7cab73c8c5512ed7bd7c9a96
font_01_sfnt_off00017188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17188 12028 bytes
SHA-256: 31bbec36ef28f49aa0b505b8c9c558ea765df89e4faa8ed2f2fe063f9696be15

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